package day02;
public class DoubleDemo {
    public static void main(String[] args) {
        //3）double双精度浮点型，8个字节
        double a = 3.14;//3.14为小数直接量，默认为double型
        float b = 3.14F;//3.14F为float型直接量
        double c = 3.0,d=2.9;
        System.out.println(c-d);//0.10000000000000009,发生舍入误差
        double e = 6.0,f=4.9;
        System.out.println(e-f);//1.0999999999999996，发生舍入误差
        double g=6.0,h=1.9;
        System.out.println(g-h);//4.1，没有发生生舍入误差
    }
}
